Background: Autologous pericranium, fascia lata (either as autograft or allograft), bovine pericardium (DuraGuard), fetal bovine tissue (Durepair), processed collagen matrix (DuraGen), and synthetic fabrics (e.g., synthetic Goretex graft) have all been used for duraplasty in Chiari decompression surgery, and no consensus exists as to the optimal material. We reviewed our experience to compare the incidence of graft-related complications associated with using acellular human dermis allograft (AlloDerm) with those of DuraGuard, DuraGen, and Durepair.
Methods: In a retrospective cohort chart review, our cohort included 119 patients who underwent 128 Chiari decompression procedures by a single surgeon from January 1, 1997, through July 31, 2012. Age, sex, smoking status, weight, and the type of dural graft used were analyzed with univariate statistical tests. Dural grafts were selected based on the commercial products available at the time of surgery during this 15-year period.
Results: The reoperation rate for cerebrospinal fluid leak causing pseudomeningocele was 2.2 % (1/46 cases) with the AlloDerm graft and 17.1 % (14/82 cases) with other materials (p = 0.01). Each of the non-AlloDerm grafts had a higher reoperation rate than AlloDerm when analyzed separately. Not using AlloDerm was the only statistically significant factor for the need for reoperation (p = 0.01).
Conclusions: The use of the AlloDerm dural graft for duraplasty in Chiari decompressions resulted in a significantly lower pseudomeningocele formation than the use of any other type of dural graft. There was no association between patient age, sex, extra weight, or smoking status and the need for reoperation.
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